Figure 6.

By rotating the limb or the radius and observing this on the image intensifier screen, it was seen that there was one position at which the angular deformity was rectified (A and B). This occurred when the X-ray beam was exactly in the plane of the deformity. In (B), a Kirschner wire was inserted at the apex and in the plane of the deformity. In (C), the possible paths for the osteotomy are demonstrated, for an inclination of 45°, obtained from Sangeorzan’s diagram5,6. The zero position is perpendicular to the diaphyseal axis of the bone, viewed in the plane of the deformity.